Researcher Robert Krikorian of the University of Cincinnati carried out a study of 47 people aged 68 and over, who had been diagnosed with a mild level of cognitive impairment. (This could entail slight memory lapses that may or may not eventually develop into dementia.)

In the study, some participants were given a powder made from a teacup-sized amount of blueberries, while others were given a placebo powder. They were given mental tests that focused on the thinking and memory skills that are often affected by dementia at the beginning of the study and again at its conclusion.

Those who consumed the berry powder showed a significant improvement in their cognitive function compared to the placebo group, and this finding was backed up by brain scans that showed more activity in the group who had consumed the blueberries.

This benefit is likely due to the anthocyanins in blueberries, which are the chemicals that give the fruit its deep blue hue. It is believed that they can affect the brain by reducing inflammation, enhancing blood flow, and making it easier for cells to communicate.

Just one of many studies showing that blueberries aid memory

Dr. Krikorian said that these findings corroborated previous studies in both humans and animals. Next, he wants to study people who are in their 50s and early 60s with a higher risk of Alzheimer's.

He also emphasizes the importance of starting to eat the berries in middle age, as research shows that the disease could actually eat away at one's brain for decades before the first symptoms start to emerge. It is not yet known what amount will get the job done, but he believes that eating the fruit a few times a week is sufficient.

A similar study by a team of researchers form the University of Reading and Peninsula Medical School in England, showed improved performance in spatial working tasks just three weeks into a three-month course of supplementing a regular diet with blueberries.

That study's principal investigator, Dr. Matt Whiteman, said: "This study not only adds science to the claim that eating blueberries are good for you, it also provides support to a diet-based approach that could potentially be used to increase memory capacity and performance in the future."

Their anti-cancer properties are believed to include the ability to reduce inflammation and oxidative stress, and inhibit the proliferation of cancerous cells. Many of blueberries' benefits can be derived from the high amount of flavonoids that cross the blood/brain barrier when one eats blueberries, as well as a number of other antioxidant and biochemical benefits.

It's pretty easy to see how organic blueberries came to be considered a superfood, when you add up all of the things that research has shown they can be good for. A 2009 study in Experimental Biology discovered that they might change the way the body stores and uses sugar for energy. The researchers in that study noted that rats who ate a blueberry-rich diet had a decrease in abdominal fat, triglycerides and cholesterol, while their glucose control got a boost.

Other studies have shown blueberries to promote urinary tract health by keeping bacteria from adhering to the walls of the urinary tract. It is also believed to be useful in preventing osteoporosis.

Alzheimer's' disease is the only one of the top ten causes of death in America that cannot be cured or even slowed, and with an estimated 5.3 million Americans living with the disease, the need for a safe and effective method of prevention is stronger than ever. While scientists believe that more studies are needed, these berries are already showing a lot of promise.